Frame, Fork & Rear Suspension

Carbon Stumpjumper EVO models feature a full carbon frame with 11m carbon. 

Sizing is done using the "S" system, with S1-S6 offered. 

Seatstay lengths vary by size to ensure proper kinematics through the range. S1-S4 share a seatstay (S205000011 & S205000012) and S5-S6 share a longer version (S205000009 & S205000010).

Chainstays are shared by all sizes (S201500008 & S201500009).

Bolt kits (S200500007) and bearing kits (S200600006) are specific to this model.  Note that there was a running change to the shape and material used for the forward shock mount bolt from a conical seat chromoly bolt to a flat seat stainless bolt with a washer.  Both versions are included in the service part kit.

Cable Routing

Internal nylon tubes are used to route the rear derailleur and brake housings (S206500008). Cables are routed into the non-driveside through the top tube and down the side arm before exiting behind the bottom bracket through a cable port which doubles as mudflap (S204300007). The nylon tubes are then routed through the chainstays to the rear.

For Shimano brake-equipped models only, a clamp holds the brake line to the non-driveside seatstay (S206500009).

Dropper seatpost cables enter the frame through a molded port on the driveside of the headtube.  The cable housing is routed through the downtube to a channel in the SWAT door bezel before going up the seat tube.  A nylon tube is not used for the dropper post cable. If a wireless dropper seatpost is used, there is an angled rubber ICR plug for the routing hole (S216500003).

Carbon Frame Geometry

The geometry table shows the bike as shipped with the headset in the zero offset position, the bottom bracket in the high position, and a 29" rear wheel.

Alloy Frame Geometry

The geometry table shows the bike as shipped with the headset in the zero offset position, the bottom bracket in the high position, and a 29" rear wheel.

Geometry Adjustments

With two adjustment points, geometry is tuneable to the rider's terrain and style. It is now possible to change the headtube angle or bottom bracket height with less impact on the other. The frame has six geometry settings: three headset settings from 63-65.5 degrees, two bottom bracket settings, and an aftermarket shock link to allow the 29" rear wheel to be replaced with a 27.5" rear wheel. See the Geometry Finder tool for more information. 

Headset

Both the carbon and alloy frames feature adjustable upper headset cups to change the headset angle (as shown in the table above). The adjustable headset cups are slightly different for the carbon and alloy frames. The headset bearings (S182500005) are shared with many other models. The entire headset assembly should be disassembled, cleaned, and lubricated every 30 hours of ride time.  More frequent service intervals may be required if riding in severe conditions.

Carbon frame adjustable headset cups

Adjustable upper headset cups (S212500017) are pictured below. A is the zero-offset headset that is used in the complete bike. B is in the small parts box and allows for a -1º or +1º angle adjustment. The bottom headset cup does not need to be changed with the top, as it has a spherical interface that allows it to move with the angle of the steerer. Be sure that the headset cups are free of dirt and debris when adjusting the upper cup angle.  Lubricate all parts with a high-quality waterproof grease. 

Alloy frame adjustable headset cups

Just like the carbon frame, the alloy Stumpjumper Evo frame ships with the zero-offset headset cup installed (A). B is in the small parts box and allows for a -1º or +1º angle adjustment. The bottom headset cup does not need to be changed with the top, as it has a spherical interface that allows it to move with the angle of the steerer. Be sure that the headset cups are free of dirt and debris when adjusting the upper cup angle.  Lubricate all parts with a high-quality waterproof grease. 

Horst Flip Chip

To adjust the bottom bracket height, remove the Horst pivot bolts (A in graphic below) from the frame. Then remove all four flip clips (B in graphic below) and align the Horst pivot spacer to either the low or high position. Make sure the spacer is correctly placed in the chainstay and both parts of the flip-chip are aligned in the same direction.

27.5 Rear Wheel Capability

If you wish to use a 27.5" rear wheel, you will need to replace the rear shock link (S204300005)

Protectors

Mylar downtube protectors are size specific and offered in a gloss finish for replacement: S209900073 - S209900075.

A molded downtube protector (S209900072) is positioned below the mylar protector.  The plastic-molded protector bolts on through the SWAT bulkhead.

A foam piece (S206900007) protects the front of the chainstay from stone chips and mud.  The driveside chainstay protector is a clip-on style similar to the last generation (S206900006).

SWAT

All models of SJ Evo are equipped with a downtube SWAT area.  The SWAT door 2.0 provides more storage area than the last model. Replacement doors and latches are available in a kit (S204200033).

A bulkhead prevents items from entering the BB area (S209900071).  The bulkhead is held in place by the bottom bolt of the molded downtube protector.

A custom shaped water reservoir has been designed to fit in the SWAT area.  The bladder is designed to fit in the downtube below the swat door.  The SWAT bulkhead prevents it from getting into the BB area. Replacement bladders are available (S209900076).

Suspension

Suspension travel varies by size:

Rear Shock

S1: 210x50mm

S2-S6: 210x55mm

Eyelet hardware: 8mm ID x 20mm W

Please note: Suspension on a bicycle is a complete system. Specialized frames are designed in conjunction with the shocks and supporting parts that come factory installed. While many aftermarket shocks (air or coil) may physically fit on the bike, they may not be compatible with the frame. Always check with the shock manufacturer to confirm compatibility with your specific frame before purchasing and installing a different shock than what was originally supplied with the bike or frame.

Shock Hardware

Shock mounting hardware is specific to SJ Evo (S204200032).  As the geo adjustment on this bike has been moved to the headset and horst pivot, the shock extension does not use flip chips.

Note that there was a running change to the shape and material used for the forward shock mount bolt from a conical seat chromoly bolt to a flat seat stainless bolt with a washer.  Both versions are included in the service part kit.

Shock Extension & Link

All 29" models share a shock link (S204300006). The shocklink from the Limited model may be used on standard models to allow use of a 27.5" rear wheel (S204300005). No additional parts, aside from the link and wheel, are required for the conversion. Both shock links are spec'd with bearings pressed in.

The shock extension comes in two variants.  SW models use a carbon version (S206300006). Comp through Pro models use an Alloy version (S206300005).  Both are interchangeable.

Axle Standards

Front axle for all models is 15x110.

SJ Evo models are equipped with 148mm Boost rear hub spacing and require a 148mm Boost compatible wheel.

Rear axle spec is shared with many other models (S170200003).